David consumes two things: gasoline (q1) and bread (qz). David's utility function is U(Q1y '12): 30(110'8'120'2- Let the price of gasoline be p1 , the price of bread be p2, and income be Y. Derive David's demand curve for gasoline. David's demand for gasoline is (11 = D. (Properly format your expression using the tools in the palette. Hover over tools to see keyboard shortcuts. 57., a subscript can be created with the_ character.)